Seems like a PLA keychain would be a good thing to offer since pretty much everyone has keys. I've only seen a few that I like, though. I don't want to be cheap and just get some metal thing with PLA stamped on it. What I really want are these:
http://www.promotionalkeychains.biz/custom-keychains-manufacturer.htmlImagine the PLA bell logo in one of those formats. My favorites are the "Artisan Series Zinc Alloy Plated 2-D Color Filled Custom Keychains" which is the 3rd item from the top. I would love to have those made, but it looks like I'd have to spend about $2,000 up front on them. That's a lot of my own money to drop on them and it would take years to make it back. I'd have to sell about 400 of them at $5.00 each. I bet 5 years later I still wouldn't sell 400 of them.
There are other options on that page which are equally cool, but they still require $1,000 - $1,500 to get started. Screw that. I can probably find a page that has slightly better prices, but I doubt it would be too much cheaper.
http://www.sz-wholesale.com/shenzhen_China_products/Solar-LCD-Keychain_1.htm I also like these solar powered LCD keychains. I've seen these at giftshops. They don't require any batteries and the image that they flash is really bright. It's like a glossy image on paper, but it flashes or changes colors. It's really neat. I can't seem to find a page of these with prices right now, but I remember them being very reasonable.
http://www.laserengravedkeychains.com/keychain-flashlight.htm Then there's a laser engraved flashlight keychain. There's tons of styles to choose from on these and they're always priced good. A flashlight on a keychain could be useful too.
If anyone has any comments or other ideas for keychains, post them here. Or maybe you can find a page that has better prices or better designs.